let X be non empty TopSpace; :: thesis: for x being Point of X
for Y being monotone-convergence T_0-TopSpace ex F being directed-sups-preserving projection Function of (oContMaps X,Y),(oContMaps X,Y) st
( ( for f being continuous Function of X,Y holds F . f = X --> (f . x) ) & ex h being continuous Function of X,X st
( h = X --> x & F = oContMaps h,Y ) )
let x be Point of X; :: thesis: for Y being monotone-convergence T_0-TopSpace ex F being directed-sups-preserving projection Function of (oContMaps X,Y),(oContMaps X,Y) st
( ( for f being continuous Function of X,Y holds F . f = X --> (f . x) ) & ex h being continuous Function of X,X st
( h = X --> x & F = oContMaps h,Y ) )
let Y be monotone-convergence T_0-TopSpace; :: thesis: ex F being directed-sups-preserving projection Function of (oContMaps X,Y),(oContMaps X,Y) st
( ( for f being continuous Function of X,Y holds F . f = X --> (f . x) ) & ex h being continuous Function of X,X st
( h = X --> x & F = oContMaps h,Y ) )
set XY = oContMaps X,Y;
reconsider f = X --> x as continuous Function of X,X ;
set F = oContMaps f,Y;
dom f = the carrier of X
by FUNCT_2:def 1;
then f * f =
the carrier of X --> (f . x)
by FUNCOP_1:23
.=
f
by FUNCOP_1:13
;
then
f is idempotent
by QUANTAL1:def 9;
then
oContMaps f,Y is idempotent directed-sups-preserving Function of (oContMaps X,Y),(oContMaps X,Y)
by Th12, Th16;
then reconsider F = oContMaps f,Y as directed-sups-preserving projection Function of (oContMaps X,Y),(oContMaps X,Y) by WAYBEL_1:def 13;
take
F
; :: thesis: ( ( for f being continuous Function of X,Y holds F . f = X --> (f . x) ) & ex h being continuous Function of X,X st
( h = X --> x & F = oContMaps h,Y ) )
thus
ex h being continuous Function of X,X st
( h = X --> x & F = oContMaps h,Y )
; :: thesis: verum